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Many approaches to software specification and design make use of invariants: constraints whose truth is preserved under operations on a system or component. Object modelling involves the definition of association invariants: constraints upon the sets of links corresponding to particular associations, most often concerning type, multiplicity, or symmetry. This paper shows how the definitions of operations may be extended to take account of association invariants, so that they may be properly considered when the operations are implemented. It introduces a formal, object-based modelling notation in which the process of extension and implementation, and thus the maintenance of association invariants, can be automated, making it easier to produce correct implementations of an object-oriented design. © Springer-Verlag 2008.

Original publication

DOI

10.1007/s10270-008-0085-0

Type

Conference paper

Publication Date

01/07/2008

Volume

7

Pages

287 - 301